10:45 AM - 11:00 AM
[21a-E303-7] Distribution of the cosmogenic 10Be in the ocean.
Keywords:Accelerator mass spectrometry, Cosmogenic nuclide, Ocean
It is necessary accumulation of oceanic Be-10 to assess Be-10 as a tracer for water mass. In this presentation, the north-south transection of Be-10 concentration shows in Indian Ocean during R/V Hakuho-maru in the KH09-5 cruise, and discuss a migration of Be-10.
According to hydrological data, Be-10 concentration in Antarctic intermediate water (AAIW) is relatively low concentration. The AAIW come from the low concentration surface water of the Antarctic Ocean. In deep-sea, the water mass, which named Common deep water, has high concentration. The Common deep water is originated from Atlantic deep sea, but the concentration of Be-10 in the Atlantic Ocean is lower than Common deep water. It is consider that the Be-10 in the surface Antarctic Ocean is transported down to the Antarctic deep sea by biogenic particles in Antarctic Ocean.
According to hydrological data, Be-10 concentration in Antarctic intermediate water (AAIW) is relatively low concentration. The AAIW come from the low concentration surface water of the Antarctic Ocean. In deep-sea, the water mass, which named Common deep water, has high concentration. The Common deep water is originated from Atlantic deep sea, but the concentration of Be-10 in the Atlantic Ocean is lower than Common deep water. It is consider that the Be-10 in the surface Antarctic Ocean is transported down to the Antarctic deep sea by biogenic particles in Antarctic Ocean.